[Size] - 257.8mm x 275mm x 8.6mm Metric Nitrile Rubber O-Ring [Rubber O-Ring] - Made of nitrile rubber with excellent oil resistance, durometer is 50A [Round Shape] - Round in cross-section to provide a seal between overlapping cylindrical surfaces [Wide Temperature Range] - Nitrile rubber O-rings can be used in a wide temperature range from -30°F (-34°C) to 250°F (121°C). [Wide Applications] - Provides seals in a wide range of applications such as plumbing, machinery, and hydraulics, preventing leaks Nitrile Rubber Ring Metric Sealing Gasket Outer Diameter 275mm Inner Diameter 257.8 mm Width 8.6mm 1 Pack 567.